Furnace



.Oct 13, 1931. A. F, NELSON FURNACE Filed Feb. 19, 1929 2 Sheets-Sheet l 3mm; HN dfea/F/l/@Zsm A. F. NELSON Oct. 13, 1931.

FURNACE Filed Feb. 19, 1929 2 Sheets-Sheet 2 wmf Hndrazzf F/Veisoz `Patented viA l My invention relates'to ffirnaoeiland particularly to furnace'sof thel'type .designed as" hot f air units for fuse With `oil bur-ners;

Heretofore, -it has-.been thel practice in vsuch furnaces, which includefa horizontal. cylin-l front or' the furnace, or that portion which supports theldoorsi and their frames,direct u on the `head yof thehorizontal'shell.atV

ly p its v y becomes intense .when the` .oil burner is i started, vWithfthe.resultl that thefhead and its jectionable, especially when.-theiinstallation attached :front starts to swell, and the doors bee-into swingopen, d ue'v tothe warping'. and V which interferes ,with y.the draft, and the motiontoandE irai y this warping,` creates 1 noises which are kobis in aresidence. .f

-' It'is-mychief objectltheiiyto provide i structionfof such furnaces whereby vthe. Warpingsand? expansion and twisting oilthef head KV'of the's'helland i other associatedparts of. the

furnace proper will have .no eiiecton the furnace front or4 lon the .doors .and their Iframes.

A :further object is tof provide .a .fooiistruc l tion Vof theV irontendof suchy furnaces,- l.Whgcliv will Vbe simple. and inexpensive, and which Will enable 4,it to 'bemore readily fitted andA held? air tight .i in a vshell which customarily 'My invention comprisesf'the novel..

. arts f and thenovel.combination,andarrangement thereof,y as shown in the accompanying draw*- ings,l described in the'y specification; andzparticiilaijly denedrby Ithe' kclaims terminating v preferred byme,

i Figure .1 isy an elevation of the furnace Y. body, the casingv being indicated vin section.

feed end'.' il' The iheatwithinfthis shellz'scon twisting of the head',y under the 5 expansion and under the' unequal?distribution!of heat'.- y Asa result,it isnotpossible.toikeepthe .doors closed properly,l

cail'seolfby` 4 igure. .3 isiLanfelevation ofi thefront fend.- ofthe urnace'body. Y; j '1- 2 Such va furnace is largely .made fupf-ofga'j horizontal para cylindrical drum 1.. f .--AtL its. reargend suchadminis inished byjthehead 55' 'y 1.9,. and-ati itsfrontendi .a .head/..11 .is tted in 10121.12@v @The iontsflnayiberreted .0I-"welded,

Hoor, ..011 which the. filmare rests. by I aprons f .12.@accederwhich, .with @he rear endf 13,- .Qrm chamberWhichmaybe l-ine d xvvith `fire {brick or li-ke refractory material; vnot anxioiiburner ,such is indicarmi B- The gasesjofcomb'ustion are led olif' throu'gha Siiiteb'le .l'diatpfsiht `.showin herein 'consist ing ...0.5i thehrzstalfconduits. le; 0111 at .each side @fille drum 1 and .cnnestedthereto by iiues l5. a t the rearvof thedrums, and; a common' drum 16 connected tol theforward end ofthe 11i by fiues I7",l and leadingftofa chimneyoutlet or smoke pipe. It'wil'l be apparent that the .construction of theradiator,y

and inffactthe constructiondof therear end front end ofzthefurnace indy..-y

Ordinarilyggthecasing -C i s rectly tothe, member corresponding tothe attachedydif* l l'ie'gf'aglv 1'1o',thedru m,`by bolting or like means. Notsonly does this j aiord communication between 1 the. furna'cef'and-y theair passager and y, igean areaffor thesupportof these Ldoors sodirectly in association .v'vith tlief ,he at .6r he furnace that 'these doors; ;mdgiheir :fr mes cannot be kept ingtheirproperf posi.-

tion; b iitV will fvvarp and` Vmove `v`vithjthe vhead 11,'fandit .hasbeen` vfound impossible to" keep the'. lOpiSproperly closed .and -to`.leep them To .overcome these" two ldiiiicultie's," then. I

khave provided a snout, which is fseciredto the v' f drum Aandato thfeLaprons 1 2vv soas to'. orm. in y l the?" eizterior `isvielle'"permitting sootff v.to collect. .thefiair passages andbe distrfibfk uted throughout' thehousebiitit affordsl so Y ofthe'iurnace body,l is immaterial,` inasmuch as my invention is chiefly o ncerne'dwith the in extension of the two aprons 12 and form thus a rectangular opening extending to the bottom of the shell.

sisting of the front 2, the side walls 20, and

the top 21. There may also be a bottom 2.2

employed if this is found desirable, and Vsimilarly, abottom 19 may form part of the furnace body, at least within theconfines of the asingle unit, so that it may be transported and installed as an integral furnace body of one piece. The welds, as between the walls 20 and 21 of the snout and the head y'11 of the drum 1, serve to stiffen the various parts and in effect rein-force the angles all of which are welded. VThis in itself prevents warping of the plates to a certain degree. However, the actual area Vof the-front 2, which is apertured' as indicated at 23 and 24, is small `and it is spaced forward from the direct heat within the drum 1 and chamber defined by the aprons 12, hence is not so subject to warping as previous. fronts, which lie in and include the entire area of the front of theV drum, and which are closer to the intense heat. This front 2 is stiffened by the various weld bends and corners referred to above, and may be reinforced and stiffened further by marginal flanges, such as the angle irons 3, which extend about and define the front edges of the plate 2. These Yare preferablywelded in place. To this front 2 are secured the frames 40 and ,'door4, the oil burner B fitting `within the lower frame 40 and closing the aperture 24, while the door'closes the aperture 23. Y

v The snout, having less area than the head exposed to the heat within, and stiffe'ned by the severalangles, the topV 21, and the welds and flanges 3, will not warp appreciably,y at least,'not to an extent'to permit the doors to open or leak,and the flanges 3, in addition to stiflening the snout, permit attachment of the casing without bolt holes between the combustion chamber and hot air passages,

so that by no possibility can fumes or soot from the furnace enter the air conduits.

./Vhat I claim as my invention is:

1. vIn a furnace, a shell including a horizontal drum-having a head secured thereto at the front end, and cut away within its top and side margins to define an opening, and a snout comprising two sides, a continuous front and a top fitted and secured to the cut-away edges of said head and projecting forwardly, the front of said snout having apertures adapted to receive doors and their frames, and the sides extending continuously from the top to a point below the drums lower surface.

j 2. In aV furnace, a shell including a horizontal drum having a. head secured thereto -at the front end, and cut away within its margins' to define an opening which extends downwardat the: sides to intersect the periphery of the drum, anda snout comprising two sides extending to the fioor, a front and a top fitted and secure-d to the edges of said opening and projecting forwardly, the front of said snout. having apertures adapted to receive doors and their frames, and stiffening flanges defining the forward marginal edges of the snout. t Y 3.In afurnace, a shell including a horizontal drum having a head integrally secured thereto at the front end, and an integral snout comprising front, two continuous sides, and a top, secured to the drums head within its top and side margins, andprojecting below the confines of the drum, and forwardly of the head, the head being cut away within the top and sides of the snout to leave an opening of the samev size as the snout, the front of said snout having apertures adapted to receive doors and their frames. 4. In a furnace, a-shell including a partlycylindrical Yhorizontal drum and an apron depending therefrom at each side, said drum having a head secured thereto at vthe, front end, and having an opening cut therein substantially in `upward extension of the aprons, a forwardlyprojecting snout including two sides, a front, and a top, secured to the inar- Vgins-of said opening', its sides forming aforward continuation of the aprons, and projecting forwardly of the head, the front of said snout' having a Vplurality of apertures adapted to receive doors' and their frames.

5. In a furnace, a. shell including a horizontal drum having a head integrally secured thereto at the'front end, anV apron depending from the drum at each side, and an integral forwardly extending snout comprising a front, two continuous sides disposed inside of the sides of the drum, and forming a for` ward extension of the aprons, and a top disposed below the top of the drum, said snout being secured to the drums head, and the headv being cut away within the confines of the snout to leave an opening tothe drums interior, thefr'ont having apertures adapted to recieve doors and their frames.

v6.' "In a furnace, a sheet metal shell including a horizontal drumvhaving a head welded thereto at the front end, an apronv depending from the drum at each side, a sheet metal snout extending` forwardly' from and Welded to the drums head, and comprisinga'top 1 i disposedy adjacent but 'below vthe drums top,

two ,continuousy sides vdisposed inside of the sidesof thedrum`loutjdependingtherebelow,v

ooplanar Withandforming a lforward extension of theaprons, and a front Welded to the top and sides, and apertured to receive doors and their frames, ythe head being cutaway 10 within the connes of the snout to ladmitL to 1 ing flanges.

thedrums interior, and stitfening flanges defning the forward "marginal edgee ofthe snoutff K 7. A furnace shell asin claim 6, the aprons at ytheir rear end terminating short of the rear end of thef'drurn, and an end wall joining the tWo aprons and secured to the under side lofthedruln;r 'f 8. In combination'with a furnace shell as in claim 6, a casing` surrounding the same and joined at itsffrward end to the kstiene l Signed at Seatt1e,`King County, State of Washington, this 13th 4day of Feb., 1929. 1

\ V Y ANDREW `FRISTOE vNELSON.y l Q 

